22. e1e4  22... b6c4 This leads to trouble. Both 22...Nbd5 and 22...Qd6 preserve equality. 23. g1f1 An almost lethal repositioning. The queen keeps an eye on the two knights, one of which can be a target after c2-c3 and the other can be captured by the rook or even the queen, as we will see shortly. 23... c4d6 The only defense. 24. c2c3 